Heptathelidae

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Heptathelidae
Heptathela.kimurai.yanbaruensis.female.-.tanikawa.jpg
Heptathela kimurai
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Suborder: Mesothelae
Family: Heptathelidae
Kishida, 1923 [1]
Genera

See text.

Heptathelidae is a family of spiders. [1] It has been sunk within the family Liphistiidae as the subfamily Heptathelinae, [2] but as of April 2024 was accepted by the World Spider Catalog. [1] It is placed in suborder Mesothelae, which contains the most basal living spiders.

Taxonomy

The group was first proposed by Kyukichi Kishida in 1923, when he described a new genus, Heptathela , and suggested creating two tribes within the family Liphistiidae, with Heptathela placed in Heptatheleae. [3] In 1939, Alexander Petrunkevitch raised the tribe Heptatheleae to a separate family, Heptathelidae. In 1985, Robert Raven reunited the two families, [4] a view supported by Breitling in 2022. [5] Other authors have maintained two separate families, [2] [6] a position accepted by the World Spider Catalog as of April 2024. [7]

Phylogeny

Molecular phylogenetic studies have repeatedly shown that the family is monophyletic. [8] One possible relationship between the genera is shown in the following Bayesian cladogram (numbers in parentheses give the number of units in the study): [9]

Mesothelae

Liphistius

Heptathelidae
China, Vietnam
Japan, including Okinawa, and the Ryukyu Islands

Genera

As of December 2023, the World Spider Catalog accepted seven genera: [1]

The genus Sinothela is considered a nomen dubium (dubious name).

Description

Members of the Heptathelidae share features with the other Mesothelae family, Liphistiidae. They are medium to large spiders. They have downward pointing, daggerlike chelicerae. [10] Like other members of the suborder Mesothelae, and unlike all other extant spiders, they have a segmented series of plates (tergites) on the upper surface of all segments of the abdomen and their spinnerets are placed in the middle of the underside of the abdomen, rather than at the end. Their sternum (a plate on the underside of the cephalothorax) is narrow, and there is another smaller ventral plate (the sternite) between the fourth pair of legs. They respire by means of two pairs of book lungs. Unlike members of the Liphistiidae, the palp of the male lacks a tibial apophysis. [11]

They live in burrows closed by trapdoors. Unlike members of the Liphistiidae, heptathelids do not construct signal lines radiating from the burrow. [11]

Related Research Articles

<span class="mw-page-title-main">Kimura spider</span> Species of trapdoor spider

Heptathela kimurai, the Kimura spider, or kimura-gumo, is an Old World spider, found primarily in Japan and named after Arika Kimura, who collected it in 1920. It belongs to the sub-order Mesothelae and can reach up to 3 cm in length. Its burrows are covered by a camouflaged "pill box" flap.

<span class="mw-page-title-main">Dipluridae</span> Family of spiders

The family Dipluridae, known as curtain-web spiders are a group of spiders in the infraorder Mygalomorphae, that have two pairs of booklungs, and chelicerae (fangs) that move up and down in a stabbing motion. A number of genera, including that of the Sydney funnel-web spider (Atrax), used to be classified in this family but have now been moved to Atracidae.

<span class="mw-page-title-main">Mesothelae</span> Suborder of spiders

The Mesothelae are a suborder of spiders. As of April 2024, two extant families were accepted by the World Spider Catalog, Liphistiidae and Heptathelidae. Alternatively, the Heptathelidae can be treated as a subfamily of a more broadly circumscribed Liphistiidae. There are also a number of extinct families.

<span class="mw-page-title-main">Liphistiidae</span> Family of trapdoor spiders from Asia

The spider family Liphistiidae was first recognized by Tamerlan Thorell in 1869. When narrowly circumscribed, it comprises a single genus Liphistius, native to Southeast Asia; as of April 2024, this was the circumscription accepted by the World Spider Catalog. The family contains the most basal living spiders, belonging to the suborder Mesothelae. The family has also been circumscribed more broadly to include the family Heptathelidae as a subfamily, Heptathelinae, with the narrowly circumscribed Liphistiidae becoming the subfamily Liphistiinae.

<i>Heptathela</i> Genus of trapdoor spiders

Heptathela is a genus of spiders that includes the Kimura spider. They are trapdoor spiders of the family Heptathelidae and are found in Japan, including Okinawa and the Ryukyu Islands. Spiders of this genus lack venom glands.

<span class="mw-page-title-main">Spider taxonomy</span> Science of naming, defining and classifying spiders

Spider taxonomy is that part of taxonomy that is concerned with the science of naming, defining and classifying all spiders, members of the Araneae order of the arthropod class Arachnida with more than 48,500 described species. However, there are likely many species that have escaped the human eye to this day, and many specimens stored in collections waiting to be described and classified. It is estimated that only one third to one half of the total number of existing species have been described.

<span class="mw-page-title-main">Opisthothelae</span> Suborder of spiders

Opisthothelae is a suborder of spiders within the order Araneae, containing Mygalomorphae and Araneomorphae, but excluding Mesothelae. The Opisthothelae are sometimes presented as an unranked clade and sometimes as a suborder of Araneae. In the latter case, Mygalomorphae and Araneomorphae are treated as infraorders.

<i>Liphistius</i> Genus of trapdoor spider

Liphistius is a genus of basal trapdoor spiders in the family Liphistiidae. They are found in Japan, China, and Southeast Asia.

<i>Ryuthela</i> Genus of spiders

Ryuthela is a spider genus in the family Heptathelidae. This genus, as well as their closest relatives, Heptathela, formed when land masses from present-day Japan separated from the rest of Asia, forming islands in the late Miocene. Speciation of Ryuthela and Heptathela also occurred during this time, because of the further separation of islands, causing allopatric speciation.

Songthela is a spider genus in the family Heptathelidae, with species found in China and Vietnam.

<i>Ryuthela tanikawai</i> Species of spider

Ryuthela tanikawai is a species of spider in the family Liphistiidae.

<i>Herennia multipuncta</i> Species of spider

Herennia multipuncta, commonly known as the spotted coin spider, is a species of spider in the family Nephilidae native to Asia. It exhibits sexual dimorphism, the female being much larger than the male. It weaves a small web on the trunk of a tree or the wall of a building and is well camouflaged by its dappled colouration.

Ganthela is a genus of spiders in the family Heptathelidae. It was first described in 2015 by Xu & Kuntner. As of 2017, it contains 7 species, all of them from China.

<i>Qiongthela</i> Genus of spiders

Qiongthela is a genus of spiders in the family Heptathelidae. As of 2021, it contains 14 species.

Sinothela is a possible genus of spiders in the family Heptathelidae. It was first described in 2003 by Haupt. The type species Heptathela sinensis had been described in 1932 based on a female specimen, but was transferred to the new genus Sinothela based on a male specimen that cannot be confidently matched to the female, so both Sinothela sinensis and Sinothela are considered to be nomina dubia.

Vinathela is a genus of spiders in the family Heptathelidae. It was first described in 2000 by Ono. As of 2017, it contains 7 species. Two species were formerly placed in the genus Nanthela, now submerged into Vinathela.

<i>Nephilingis</i> Genus of spiders

Nephilingis is a genus of spiders in the family Nephilidae. It was split off from the genus Nephilengys in 2006. Both genera have been called hermit spiders from the habit of staying in their retreats during the day; alternatively the name "hermit spider" may be reserved for Nephilingis, with Nephilengys species called "eunuch spiders".

Eburneana wandae is a species of jumping spider in the genus Eburneana that mimics ants. It was named by Tamás Szűts after the Polish arachnologist Wanda Wesołowska. The male of the species was first described in 2003, with the holotype found in the forests of central Africa. It is a relatively large spider, 8.2 millimetres (0.32 in) long, and is distinguished from the similar Eburneana scharffi by its different geography, being found in Cameroon rather than Tanzania, and the shape of the spider's front legs.

Luthela is a genus of spiders in the family Heptathelidae, found in China.

References

  1. 1 2 3 4 "Family Heptathelidae Kishida, 1923 (genus list)", World Spider Catalog, Natural History Museum Bern, retrieved 2023-12-14
  2. 1 2 Li, S.Q. (2022), "On the taxonomy of spiders of the suborder Mesothelae", Acta Arachnologica Sinica, 31 (1): 71–72, doi:10.3969/j.issn.1005-9628.2022.01.013 via World Spider Catalog
  3. Kishida, K. (1923), "Heptathela, a new genus of liphistiid spiders", Annotationes Zoologicae Japonenses, 10: 235–242 via World Spider Catalog
  4. Raven, R. J. (1985), "The spider infraorder Mygalomorphae (Araneae): cladistics and systematics", Bulletin of the American Museum of Natural History, 182: 1–180 via World Spider Catalog
  5. Breitling, R. (2022), "On the taxonomic rank of the major subdivisions of the extant segmented spiders (Arachnida: Araneae: Mesothelae: Liphistiidae s. lat.)", Miscellanea Araneologica, 2022: 1–4 via World Spider Catalog
  6. Kulkarni, S.; Wood, H. M. & Hormiga, G. (2023), "Advances in the reconstruction of the spider tree of life: a roadmap for spider systematics and comparative studies", Cladistics, 39 (6): 479–532, doi:10.1111/cla.12557, PMID   37787157
  7. "Family: Heptathelidae Kishida, 1923", World Spider Catalog, Natural History Museum Bern, retrieved 2024-04-23
  8. Xu, Xin; Liu, Fengxiang; Cheng, Ren-Chung; Chen, Jian; Xu, Xiang; Zhang, Zhisheng; Ono, Hirotsugu; Pham, Dinh Sac; Norma-Rashid, Y.; Arnedo, Miquel A.; Kuntner, Matjaž & Li, Daiqin (2015). "Extant primitively segmented spiders have recently diversified from an ancient lineage". Proceedings of the Royal Society B. 282 (1808): 20142486. doi:10.1098/rspb.2014.2486. PMC   4455790 . PMID   25948684.
  9. Wei, M.; Wang, S. Q. & Lin, Y. C. (2023), "Systematic notes on three new Luthela (Mesothelae, Heptathelidae) spiders from China, with their descriptions", ZooKeys (1159): 151–168, Bibcode:2023ZooK.1159..151W, doi: 10.3897/zookeys.1159.90120
  10. Haupt, J. (2004), "The Mesothelae - a monograph of an exceptional group of spiders (Araneae: Mesothelae)", Zoologica, 154 (8), ISBN   3-510-55041-2, ISSN   0044-5088
  11. 1 2 Xin, Xu; Liu, Fengxiang; Chen, Jian; Ono, Hirotsugu; Li, Daiqin & Kuntner, Matjaž (2015-03-21), "A genus-level taxonomic review of primitively segmented spiders (Mesothelae, Liphistiidae)", ZooKeys (488): 121–151, Bibcode:2015ZooK..488..121X, doi: 10.3897/zookeys.488.8726 , PMID   25878527